You can make your roof panel out of any material you like. For my roof, I chose fluted galvanized sheet metal roofing because I thought it would look great painted and because my local big box store doesn’t carry wood shingles. I purchased one large sheet and had it trimmed at Lowes into four pieces at 18” long (it was painful to watch the guy cut it by hand with tin snips, but more painful for me to think about doing it myself. They are an awkward tool to use). I attached them to the frame using the wood ribbing strips you can purchase for this application. I know you’re thinking I’m a crazy mom for putting a sharp metal roof on my kids’ bed, but I did take extra precaution. I purchased 25 feet of ¼” vinyl tubing and spliced it open on one side the entire length. After a failed attempt with silicone caulking, I broke out my hot glue gun and glued the tubing all the way around the edge of the roof. It is secure and provides a little “bumper” around the perimeter so no one gets poked if they should get too close. No one has caught a jugular yet.